http://archive.greenbaypressgazette.com/VideoNetwork/1601268398001/Coveted-Royal-Diamond-for-Salehttp://cdn.newslook.com/e8/e87fd12f5b8ef282cf3c9a6588957295/mp4_high/e87fd12f5b8ef282cf3c9a6588957295-mp4_high.mp4http://archive.greenbaypressgazette.com/VideoNetwork/1601268398001/Coveted-Royal-Diamond-for-Salehttp://cdn.newslook.com/e8/e87fd12f5b8ef282cf3c9a6588957295/images/frame_0007.jpgCoveted Royal Diamond for SaleThe extremely rare Beau Sancy diamond, which has passed through the royal families of France, England, Prussia and the Netherlands' House of Orange, is to go up for auction at Sotheby's.1The NetherlandsauctionGeorg FriedrichBeau SancygenevaussothebysNewsdomesticUnited KingdomLondonNew YorkdiamondnewslookswitzerlandDavid BennetfrancebidArts & Society01:52